CVE-2026-68555

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{"affected": [{"affectedData": [{"product": "coturn", "vendor": "coturn", "versions": [{"status": "affected", "version": ">= 4.15.0, < 4.16.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Coturn is a free open source implementation of TURN and STUN Server. In 4.15.0, an authenticated TURN user can repeatedly resume one allocation from fresh UDP 5-tuples without completing a handoff when the server enables --mobility. mobile_begin_transition() in src/server/ns_turn_server.c disarms each new session's allocation timeout and overwrites the allocation's single mobile_pending_resume link, leaving earlier pending sessions unreachable by the cleanup path, while copy_auth_parameters() ignores inc_quota() failure. The attacker can therefore retain unbounded server-side sessions and exhaust process memory even when --user-quota=1 is configured. This issue is fixed in version 4.16.0."}, {"lang": "es", "value": "Coturn es una implementaci\u00f3n gratuita de c\u00f3digo abierto de servidor TURN y STUN. En 4.15.0, un usuario TURN autenticado puede reanudar repetidamente una asignaci\u00f3n desde nuevas 5-tuplas UDP sin completar una transferencia cuando el servidor habilita --mobility. mobile_begin_transition() en src/server/ns_turn_server.c desactiva el tiempo de espera de asignaci\u00f3n de cada nueva sesi\u00f3n y sobrescribe el \u00fanico enlace mobile_pending_resume de la asignaci\u00f3n, dejando las sesiones pendientes anteriores inalcanzables por la ruta de limpieza, mientras que copy_auth_parameters() ignora el fallo de inc_quota(). El atacante puede, por lo tanto, retener sesiones ilimitadas del lado del servidor y agotar la memoria del proceso incluso cuando --user-quota=1 est\u00e1 configurado. Este problema est\u00e1 solucionado en la versi\u00f3n 4.16.0."}], "id": "CVE-2026-68555", "lastModified": "2026-10-26T10:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-68555", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T18:13:53.709392Z", "version": "2.0.3"}}]}, "published": "2026-08-19T21:17:28.453", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/coturn/coturn/commit/a97f1924bb435bec49d6d91ae01fa2487c2e1bf7"}, {"source": "security-advisories@github.com", "url": "https://github.com/coturn/coturn/releases/tag/4.16.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/coturn/coturn/security/advisories/GHSA-hpq3-g7x4-h7xx"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/coturn/coturn/security/advisories/GHSA-hpq3-g7x4-h7xx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.15.0,4.16.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "coturn", "source": "cna", "vendor": "coturn"}, "product": "coturn", "vendor": "coturn"}], "created": "2026-08-20T00:45:06.291432+00:00", "updated": "2026-08-20T08:15:17.074431+00:00", "vendors": ["coturn", "coturn$PRODUCT$coturn"]}